/* ===========================================================
   page-faq · 问题排查
   作用域限定在 .page-faq 内
   =========================================================== */

.page-faq {
  --faq-grid: rgba(201, 209, 206, .07);
  --faq-panel: rgba(16, 36, 31, .55);

  position: relative;
  font-family: var(--sans);
  color: var(--paper);
  background-color: var(--ink);
  background-image:
    linear-gradient(var(--faq-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--faq-grid) 1px, transparent 1px);
  background-size: 32px 32px, 32px 32px;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after { box-sizing: border-box; }

.page-faq p { margin: 0; }

.page-faq img { max-width: 100%; }

.page-faq .wrap,
.page-faq .faq-layout,
.page-faq .faq-answers,
.page-faq .faq-index,
.page-faq .faq-block { min-width: 0; }

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding-top: clamp(18px, 3vw, 30px);
  padding-bottom: clamp(10px, 1.6vw, 16px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: 0 0 clamp(26px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
}

.page-faq .faq-hero__copy { min-width: 0; }

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  max-width: 22ch;
  font-size: clamp(1.85rem, 5vw, 3.4rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin-top: clamp(16px, 2.4vw, 22px);
  max-width: 56ch;
  font-size: clamp(15px, .6vw + .9rem, 17px);
  line-height: 1.8;
  color: var(--silver);
}

/* 关键数字带 */
.page-faq .faq-facts {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-facts li {
  padding: 12px 14px;
  background: var(--ink);
  min-width: 0;
}

.page-faq .faq-facts .k {
  display: block;
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-facts .v {
  display: block;
  margin-top: 5px;
  font-family: var(--mono);
  font-size: clamp(14px, .5vw + .7rem, 17px);
  letter-spacing: .02em;
  color: var(--amber);
}

/* 首屏图片 */
.page-faq .faq-hero__media {
  position: relative;
  min-width: 0;
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
  filter: saturate(.88) contrast(1.06);
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 62px;
  height: 62px;
  border-right: 2px solid var(--orange);
  border-bottom: 2px solid var(--orange);
  pointer-events: none;
}

/* ---------- 筛选工具条 ---------- */
.page-faq .faq-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 22px;
  padding: clamp(14px, 2.2vw, 22px) 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-toolbar__label {
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-toolbar .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.page-faq .faq-toolbar .filter-btn {
  appearance: none;
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1;
  padding: 9px 15px;
  color: var(--silver);
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-toolbar .filter-btn:hover,
.page-faq .faq-toolbar .filter-btn:focus-visible {
  color: var(--amber);
  border-color: var(--amber);
}

.page-faq .faq-toolbar .filter-btn[aria-pressed="true"],
.page-faq .faq-toolbar .filter-btn.is-active {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink);
  font-weight: 700;
}

.page-faq .filter-bar__count {
  margin-left: 4px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}

/* ---------- 双列布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
  padding: clamp(28px, 5vw, 60px) 0 clamp(44px, 6vw, 88px);
}

/* 左列：现象索引 */
.page-faq .faq-index { align-self: start; }

.page-faq .faq-index__title {
  margin: 0 0 14px;
  padding-bottom: 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--silver);
  border-bottom: 1px solid var(--orange);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index__list a {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 12px 8px 12px 10px;
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  color: var(--silver);
  font-size: 14px;
  line-height: 1.55;
  text-decoration: none;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  background: rgba(255, 106, 26, .08);
  border-left-color: var(--orange);
  color: var(--paper);
}

.page-faq .faq-index__no {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--orange);
}

.page-faq .faq-index__jump {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 16px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--amber);
  border: 1px solid rgba(255, 178, 94, .45);
  text-decoration: none;
  transition: background .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-index__jump:hover,
.page-faq .faq-index__jump:focus-visible {
  background: rgba(255, 178, 94, .12);
  border-color: var(--amber);
}

/* 右列：答案块 */
.page-faq .faq-answers {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.6vw, 26px);
}

.page-faq .faq-block {
  position: relative;
  padding: clamp(20px, 3vw, 32px);
  background: var(--faq-panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  scroll-margin-top: 120px;
}

.page-faq .faq-block__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-block__no {
  flex: none;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--orange);
}

.page-faq .faq-block__title {
  margin: 0;
  font-size: clamp(1.1rem, .8vw + .9rem, 1.45rem);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-k {
  display: block;
  margin-bottom: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .faq-tri {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.page-faq .faq-tri > div { min-width: 0; }

.page-faq .faq-tri p {
  font-size: 15px;
  line-height: 1.78;
  color: var(--silver);
}

/* 排查步骤：编号方块 + 细线 */
.page-faq .faq-steps ol {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: faqstep;
}

.page-faq .faq-steps li {
  position: relative;
  counter-increment: faqstep;
  padding: 12px 0 12px 46px;
  border-top: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
}

.page-faq .faq-steps li:last-child { border-bottom: 1px solid var(--line); }

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 13px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--ink);
  background: var(--orange);
}

.page-faq .faq-steps li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 13px;
  top: 44px;
  bottom: -1px;
  width: 1px;
  background: var(--line);
}

.page-faq .faq-back {
  display: inline-block;
  margin-top: 18px;
  padding-bottom: 2px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-back:hover,
.page-faq .faq-back:focus-visible {
  color: var(--amber);
  border-color: var(--amber);
}

/* ---------- 两分钟自查清单 ---------- */
.page-faq .faq-checklist {
  padding: clamp(40px, 6vw, 84px) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background-color: var(--ink-2);
  background-image:
    linear-gradient(rgba(201, 209, 206, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 209, 206, .05) 1px, transparent 1px);
  background-size: 32px 32px, 32px 32px;
}

.page-faq .faq-checklist__head { min-width: 0; }

.page-faq .faq-checklist__title {
  margin: 14px 0 0;
  max-width: 26ch;
  font-size: clamp(1.5rem, 3.2vw, 2.35rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-checklist__lead {
  margin-top: 14px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--silver);
}

.page-faq .faq-checklist__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 6;
  object-fit: cover;
  margin: clamp(22px, 3.5vw, 38px) 0;
  border: 1px solid var(--line);
  filter: saturate(.85) contrast(1.05);
}

.page-faq .faq-check__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-faq .chk {
  position: relative;
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}

.page-faq .chk:first-child { border-top: 1px solid var(--line); }

.page-faq .chk input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .chk__box {
  position: relative;
  display: block;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  border: 1px solid var(--silver);
  background: transparent;
  transition: background .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .chk__box::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  transform: rotate(45deg) scale(0);
  transition: transform .18s var(--ease);
}

.page-faq .chk input:checked + .chk__box {
  background: var(--orange);
  border-color: var(--orange);
}

.page-faq .chk input:checked + .chk__box::after {
  transform: rotate(45deg) scale(1);
}

.page-faq .chk input:focus-visible + .chk__box {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.page-faq .chk__text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--silver);
  transition: color .2s var(--ease);
}

.page-faq .chk input:checked ~ .chk__text { color: var(--muted); }

/* ---------- 反馈与响应 ---------- */
.page-faq .faq-feedback {
  padding: clamp(40px, 6vw, 84px) 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-feedback__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-faq .faq-feedback__main,
.page-faq .faq-feedback__contact { min-width: 0; }

.page-faq .faq-feedback__title {
  margin: 14px 0 0;
  max-width: 24ch;
  font-size: clamp(1.4rem, 2.6vw, 2.05rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-feedback__lead {
  margin-top: 14px;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--silver);
}

.page-faq .faq-feedback__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-faq .faq-feedback__list li {
  position: relative;
  padding: 14px 0 14px 20px;
  border-top: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.72;
  color: var(--silver);
}

.page-faq .faq-feedback__list li:last-child { border-bottom: 1px solid var(--line); }

.page-faq .faq-feedback__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.55em;
  width: 9px;
  height: 2px;
  background: var(--orange);
}

.page-faq .faq-feedback__k {
  display: block;
  margin-bottom: 2px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--amber);
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--faq-panel);
}

.page-faq .faq-contact__list li {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 12px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
  min-width: 0;
}

.page-faq .faq-contact__list li:last-child { border-bottom: 0; }

.page-faq .faq-contact__k {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-faq .faq-contact__v {
  min-width: 0;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.5;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__more {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-contact__more a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 178, 94, .45);
}

.page-faq .faq-contact__more a:hover { border-color: var(--amber); }

/* ---------- 顺延阅读 ---------- */
.page-faq .faq-elsewhere {
  padding: clamp(30px, 4vw, 52px) 0 clamp(44px, 6vw, 76px);
}

.page-faq .faq-elsewhere__title {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-elsewhere__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-elsewhere__list a {
  display: block;
  padding: 18px 20px;
  background: var(--ink);
  color: var(--silver);
  font-size: 14px;
  line-height: 1.6;
  text-decoration: none;
  transition: background .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-elsewhere__list a:hover,
.page-faq .faq-elsewhere__list a:focus-visible {
  background: rgba(255, 106, 26, .1);
  color: var(--amber);
}

/* ===========================================================
   媒体查询 · 移动端优先
   =========================================================== */

@media (min-width: 560px) {
  .page-faq .faq-facts { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 720px) {
  .page-faq .faq-elsewhere__list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 780px) {
  .page-faq .faq-tri { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
  .page-faq .faq-check__list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 clamp(24px, 4vw, 56px); }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }
  .page-faq .faq-hero__media { align-self: end; }

  .page-faq .faq-feedback__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 22px);
  }
}

@media (max-width: 480px) {
  .page-faq .faq-hero__title { font-size: 1.72rem; max-width: none; }
  .page-faq .faq-facts { grid-template-columns: minmax(0, 1fr); }
  .page-faq .faq-hero__media::after { width: 44px; height: 44px; }
  .page-faq .faq-steps li { padding-left: 40px; }
  .page-faq .faq-contact__list li { grid-template-columns: minmax(0, 1fr); gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}